Fig. 4

Stress-strain curves of WCFS specimens soaked in different alkaline solutions for different durations: (a) natural state; (b) soaked 4 h; (c) soaked 8 h; (d) soaked 12 h; (e) soaked 16 h; (f) soaked 20 h.

Stress-strain curves of WCFS specimens soaked in different alkaline solutions for different durations: (a) natural state; (b) soaked 4 h; (c) soaked 8 h; (d) soaked 12 h; (e) soaked 16 h; (f) soaked 20 h.